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Gnathostoma binucleatum (Spirurida: Gnathostomatidae) en peces dulceacuícolas de Tabasco, México
Kifune,Teiji; Lamothe-Argumedo,Rafael; García-Prieto,Luis; Oceguera-Figueroa,Alejandro; León-Règagnon,Virginia;
Revista de Biología Tropical , 2004,
Abstract: human gnathostomiasis is a food-born parasitic disease of relative importance in many countries in southeast asia. it is caused by several species of nematodes of the genus gnathostoma. in mexico is an emerging public health problem since 1970, when first cases were reported. until today, larval morphometric characters that have been proposed to differentiate between the three species of gnathostoma present in this country, are not satisfactory. recently, the presence of advanced third-stage larvae advl 3 (infective form for humans) in freshwater fishes from pantanos de centla, tabasco, was recorded but their specific identity was not clarified. examination of four species of freshwater fishes from the same locality revealed that three of them: petenia splendida (n=58), cichlasoma managuense (n=35) and gobiomorus dormitor (n=9) were infected by 15 advl 3 of gnathostoma binucleatum. specific identity was obtained comparing the internal transcribed spacer 2 (its2) of the ribosomal dna with sequences reported in genbank. this is the first record of g. binucleatum in p. splendida and g. dormitor from tabasco and the first specific determination of the parasite in the locality
Gnathostoma binucleatum (Spirurida: Gnathostomatidae) en peces dulceacuícolas de Tabasco, México  [cached]
Teiji Kifune,Rafael Lamothe-Argumedo,Luis García-Prieto,Alejandro Oceguera-Figueroa
Revista de Biología Tropical , 2004,
Abstract: La gnatostomiasis humana se adquiere al ingerir pescado de agua dulce crudo o insuficientemente cocido, infectado con larvas de tercer estadio avanzado (L3A) de nemátodos del género Gnathostoma. En el sureste de Asia, este padecimiento tiene una importancia relativa; en México, se le considera un problema de salud pública emergente desde 1970, cuando fueron registrados los primeros casos. Hasta la fecha, no se han establecido con precisión los caracteres morfométricos para diferenciar las L3A de las tres especies del género distribuidas en este país. Recientemente, se registraron larvas del parásito en peces dulceacuícolas de los Pantanos de Centla, Tabasco, sin definir su identidad específica. El análisis de cuatro especies de peces de la misma localidad reveló que tres de ellos: Petenia splendida (n=58), Cichlasoma managuense (n=35) y Gobiomorus dormitor (n=9), resultaron positivas a la infección por Gnathostoma binucleatum. La identificación del parásito se obtuvo comparando la secuencia del espaciador interno 2 (ITS2) del ADN ribosomal del material de Tabasco, con secuencias disponibles en Genbank. Este trabajo constituye el primer registro de G. binucleatum en P. splendida y G. dormitor de Tabasco y la primera determinación a nivel específico del parásito en la localidad Human gnathostomiasis is a food-born parasitic disease of relative importance in many countries in Southeast Asia. It is caused by several species of nematodes of the genus Gnathostoma. In Mexico is an emerging public health problem since 1970, when first cases were reported. Until today, larval morphometric characters that have been proposed to differentiate between the three species of Gnathostoma present in this country, are not satisfactory. Recently, the presence of advanced third-stage larvae AdvL 3 (infective form for humans) in freshwater fishes from Pantanos de Centla, Tabasco, was recorded but their specific identity was not clarified. Examination of four species of freshwater fishes from the same locality revealed that three of them: Petenia splendida (n=58), Cichlasoma managuense (n=35) and Gobiomorus dormitor (n=9) were infected by 15 AdvL 3 of Gnathostoma binucleatum. Specific identity was obtained comparing the internal transcribed spacer 2 (ITS2) of the ribosomal DNA with sequences reported in Genbank. This is the first record of G. binucleatum in P. splendida and G. dormitor from Tabasco and the first specific determination of the parasite in the locality
Morphological and molecular identification of Gnathostoma binucleatum (Nematoda: Gnathostomatidae) advanced third stage larvae (AdvL3) in the state of Colima, Mexico
García-Márquez, Luis Jorge;Lamothe-Argumedo, Rafael;Osorio-Sarabia, David;García-Prieto, Luis;León-Règagnon, Virginia;
Revista mexicana de biodiversidad , 2009,
Abstract: as a part of an ongoing project to understand the current distribution of gnathostoma species in mexico, 22 species of vertebrates were examined for this nematode in the state of colima. the fish species dormitator latifrons ("chococo") and sciades guatemalensis ("cuatete") from cuyutlán lagoon and the reptile crocodylus acutus from the amela lagoon were positive for infection. morphometric characteristics of the larvae collected in colima were similar to those of g. binucleatum larvae collected from other regions and host species in mexico. the low divergence of the its sequence obtained in this study from that of g. binucleatum (0.19%) indicates that our material belongs to this species. this is the first record of the advl3 of g. binucleatum in colima, the tenth state in mexico in which this species has been recorded in wild vertebrates.
Morphological and molecular identification of Gnathostoma binucleatum (Nematoda: Gnathostomatidae) advanced third stage larvae (AdvL3) in the state of Colima, Mexico Determinación morfológica y molecular de larvas del tercer estadio larvario (L3A) de Gnathostoma binucleatum (Nematoda: Gnathostomatidae) del estado de Colima, México  [cached]
Luis Jorge García-Márquez,Rafael Lamothe-Argumedo,David Osorio-Sarabia,Luis García-Prieto
Revista mexicana de biodiversidad , 2009,
Abstract: As a part of an ongoing project to understand the current distribution of Gnathostoma species in Mexico, 22 species of vertebrates were examined for this nematode in the state of Colima. The fish species Dormitator latifrons ("chococo") and Sciades guatemalensis ("cuatete") from Cuyutlán Lagoon and the reptile Crocodylus acutus from the Amela Lagoon were positive for infection. Morphometric characteristics of the larvae collected in Colima were similar to those of G. binucleatum larvae collected from other regions and host species in Mexico. The low divergence of the ITS sequence obtained in this study from that of G. binucleatum (0.19%) indicates that our material belongs to this species. This is the first record of the AdvL3 of G. binucleatum in Colima, the tenth state in Mexico in which this species has been recorded in wild vertebrates. Como parte de un proyecto para definir la distribución actual de las especies de Gnathostoma en México, examinamos 22 especies de vertebrados en el estado de Colima en busca de este nematodo. Las especies de peces Dormitator latifrons ("chococo") y Sciades guatemalensis ("cuatete") de la laguna de Cuyutlán y el reptil Crocodylus acutus de la laguna de Amela resultaron positivos a la infección. Las características morfométricas de las larvas encontradas en Colima son similares a las de las larvas de G. binucleatum recolectadas en otras regiones y especies de hospederos en México. La escasa divergencia entre las secuencias del ITS obtenidas en este estudio con aquella de G. binucleatum (0.19%) indica que nuestro material pertenece a esta especie. Este es el primer registro de la L3A de G. binucleatum en Colima, siendo éste el décimo estado en México en donde se ha registrado a esta especie en vertebrados silvestres.
Systematics of the genus Gnathostoma (Nematoda: Gnathostomatidae) in the Americas
Bertoni-Ruiz, Florencia;Lamothe y Argumedo, Marcos Rafael;García-Prieto, Luis;Osorio-Sarabia, David;León-Régagnon, Virginia;
Revista mexicana de biodiversidad , 2011,
Abstract: to date, more than 20 species of the genus gnathostoma have been described as parasites of mammals, 9 of them in the americas. however, the taxonomic status of some of these species has been questioned. the main goal of this study is to clarify the validity of the american species included in the genus. in order to complete this objective, we analyze type and/or voucher specimens of all these species deposited in 6 scientific collections, through morphometric and ultrastructural studies. based on diagnostic traits as host specificity, site of infection, body size, cuticular spines, presence of 1 or 2 bulges in the polar ends of eggs, as well as eggshell and caudal bursa morphology, we re-establish gnathostoma socialis (leidy, 1858) and confirm the validity of other 6 species: gnathostoma turgidum stossich, 1902, gnathostoma americanum travassos, 1925, gnathostoma procyonis chandler, 1942, gnathostoma miyazakii anderson, 1964, gnathostoma binucleatum almeyda-artigas, 1991, and gnathostoma lamothei bertoni-ruiz, garcía-prieto, osorio-sarabia and león-règagnon, 2005. gnathostoma didelphis chandler, 1932 and gnathostoma brasiliensis ruiz, 1952 are considered synonyms of g. turgidum. finally, based on a wide revision of specimens deposited in 6 american collections, we conclude that records of gnathostoma spinigerum owen, 1836 in the americas are invalid.
Systematics of the genus Gnathostoma (Nematoda: Gnathostomatidae) in the Americas Sistemática del género Gnathostoma (Nematoda: Gnathostomatidae) en América  [cached]
Florencia Bertoni-Ruiz,Marcos Rafael Lamothe y Argumedo,Luis García-Prieto,David Osorio-Sarabia
Revista mexicana de biodiversidad , 2011,
Abstract: To date, more than 20 species of the genus Gnathostoma have been described as parasites of mammals, 9 of them in the Americas. However, the taxonomic status of some of these species has been questioned. The main goal of this study is to clarify the validity of the American species included in the genus. In order to complete this objective, we analyze type and/or voucher specimens of all these species deposited in 6 scientific collections, through morphometric and ultrastructural studies. Based on diagnostic traits as host specificity, site of infection, body size, cuticular spines, presence of 1 or 2 bulges in the polar ends of eggs, as well as eggshell and caudal bursa morphology, we re-establish Gnathostoma socialis (Leidy, 1858) and confirm the validity of other 6 species: Gnathostoma turgidum Stossich, 1902, Gnathostoma americanum Travassos, 1925, Gnathostoma procyonis Chandler, 1942, Gnathostoma miyazakii Anderson, 1964, Gnathostoma binucleatum Almeyda-Artigas, 1991, and Gnathostoma lamothei Bertoni-Ruiz, García-Prieto, Osorio-Sarabia and León-Règagnon, 2005. Gnathostoma didelphis Chandler, 1932 and Gnathostoma brasiliensis Ruiz, 1952 are considered synonyms of G. turgidum. Finally, based on a wide revision of specimens deposited in 6 American collections, we conclude that records of Gnathostoma spinigerum Owen, 1836 in the Americas are invalid. A la fecha, se han descrito más de 20 especies del género Gnathostoma parásitas de mamíferos, 9 de ellas en America. Sin embargo, el estado taxonómico de algunas ha sido cuestionado. El objetivo de este estudio es aclarar la validez de las especies americanas incluidas en el género. Para ello, se analizaron ejemplares tipo o de referencia de todas las especies, depositados en 6 colecciones científicas, mediante estudios morfométricos y ultraestructurales. Con base en rasgos diagnósticos como especificidad hospedatoria, sitio de infección, dimensiones corporales, espinas cuticulares (número de puntas, densidad, forma y distribución), presencia de uno ó dos tapones polares en los huevos, así como morfología de la bursa, patrón papilar y de la cubierta de los huevos, se re-establece a Gnathostoma socialis (Leidy, 1858) y se confirma la validez de otras 6 especies: Gnathostoma turgidum Stossich, 1902, Gnathostoma americanum Travassos, 1925, Gnathostoma procyonis Chandler, 1942, Gnathostoma miyazakii Anderson, 1964, Gnathostoma binucleatum Almeyda-Artigas, 1991 y Gnathostoma lamothei Bertoni-Ruiz, García-Prieto, Osorio Sarabia y León-Règagnon, 2005. Gnathostoma didelphis Chandler, 1932 y Gnathostoma brasiliensis
Intravitreal live gnathostoma spinigerum  [cached]
Basak Samar,Sinha Tushar,Bhattacharya Debasish,Hazra Tushar
Indian Journal of Ophthalmology , 2004,
Abstract: Intraocular infestation by live Gnathostoma spinigerum is a rare occurrence in humans. Most of the published reports are from South-East Asia. We report a case of intravitreal gnathostomiasis, where the worm was removed live and intact by pars plana vitrectomy.
Reptilia, Testudines, Kinosternidae, Kinosternon scorpioides scorpioides (Linnaeus, 1766): Distribution extension  [PDF]
Costa, H. C.,Molina, F. B.,S?o-Pedro, V. A.,Feio, R. N.
Check List , 2010,
Abstract: Kinosternon scorpioides scorpioides is the only subspecies of K. scorpioides with a South American distribution.We report the third known register of this taxon for the state of Mato Grosso, Brazil, representing the first record from theAripuan River basin. This point is at 390 km and 910 km western from the two previously known records of this species inMato Grosso, reinforcing the importance of inventories of K. s. scorpioides.
Ultraestructura de la cáscara de huevos eclosionados y no eclosionados de Kinosternon angustipons (Testudinata: Kinosternidae)
Acu?a-Mesén,R.; Segura -Solís,S.; Alvarado,L.; Sachsse,W.;
Revista de Biología Tropical , 2001,
Abstract: the ultrastructure of eggshells of kinosternon angustipons is described and compared with the ones of k. leucostomum and k. scorpioides. four eggs from captive turtles (30 sections) were studied with scanning electron microscopy (sem). the shell has three layers: cuticle or external, calcareous or intermediate and testacean or internal. hatched and non hatched eggs have similar characteristics in their external surface: fanned units and proteic fibers superposed at random. they differ in the presence of spongelike structures and more external porosity in non hatched eggs. the intermediate and testacean layers of the hatched eggs have lance point like spaces and are thin in the proteic fibers. the ultrastructural evidence shows that during the embryonic development the thickness of the peel decreases. non hatched k. angustipons shells are thicker than in the other two kinosternon species of costa rica
DISTRIBUI O ARTERIAL DOS PRINCIPAIS VASOS DA CAVIDADE CELOMáTICA EM Kinosternon sorpioides ARTERIAL DISTRIBUTION OF THE PRINCIPAL VASES OF THE CAVITY CELOMATIC IN Kinosternon scorpioides  [cached]
Samia Clara Rodrigues de Oliveira,Antonio Augusto Nascimento Machado Júnior,Rafael Cardoso Carvalho,Lígia Almeida Pereira
Ciência Animal Brasileira , 2009,
Abstract: Descreveu-se a distribui o arterial dos principais vasos da cavidade celomática de seis exemplares de Kinosternon scorpioides scorpioides, adultos. O circuito arterial foi preenchido com látex corado e os espécimes dissecados foram fixados em solu o de formaldeído a 10%. Evidenciou-se que a irriga o dos principais órg os da cavidade celomática, a partir das aortas, esquerda e direita, formam a aorta dorsal. A aorta esquerda dividiu-se em ramos celíaco e o mesentérico do ramo celíaco derivou duas artérias gástricas. A artéria mesentérica respondeu pela irriga o dos segmentos dos intestinos delgado e grosso, e contribuiu na irriga o do ba o através da artéria esplênica. A aorta direita anastomosa-se à esquerda formando a aorta dorsal. Esta, por sua vez, irrigou os rins e órg os genitais femininos e masculinos e finaliza-se como artérias ilíacas comuns direita e esquerda. Concluiu-se que, em Kinosternon s. scorpioides, a origem e o trajeto das aortas apresentaram semelhan a com outras espécies de quel nios, com varia es no que se refere à distribui o dos seus ramos primários. PALAVRAS-CHAVES: Anatomia, artérias, Kinosternon scorpioides scorpioides. Were described the arterial distribution of the vessels in the celomatic cavity of six Kinosternon scorpioides scorpioides adults. The arterial circuit was filled out with red-faced latex, fixation in solution formaldehyd to 10% and dissection subsequent. It was evidenced that the irrigation of the organs of the cavity celomatic happens starting from two aorta, the left and the right aorta that form the dorsal aorta. The left aorta becomes separated in two branches the celiac and the mesenteric artery. The celiac branch originate two gastric arteries. While the mesenteric artery answers for the irrigation of the segments of the small intestines and thick, besides contributing for the irrigation of the spleen, through the esplenic artery. The right aorta joins the left aorta to form the dorsal aorta, this emits branches to the kidneys and genital organs of the female and of the male, before of the division in the right and left common iliacs arteries. It is possible to conclude that the Kinosternon s. scorpioides showed certain likeness with other chelonies species , in relation the origin and the distribution of the aortas, with some variations in what refers the distribution of your primary branches. KEY WORDS: Anatomy, arteries, Kinosternon scorpioides scorpioides.
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